Someone should train some AI on decompiled code of Windows (not encouraging, but it would be interesting). Copyright is important for corpos when it protects their interests. Producing exact text as in NYT articles is pretty much a copyright violation. At least the last time the companies were trying to blame each other that their Java API implementations look pretty similar.
Even for open source code you cannot just remove the authors and license, replace some functions and say "oh, it is my code now". Only public domain code would allow these. But with copilot you could.